Process for automatic counting and measurement of particles

Details Process for automatic counting and measurement of particles Process for automatic counting and measurement of particles

1975-08-07

1977-05-03

McGraw, Vincent P.

Optics: measuring and testing

Blood analysis

250222PC, 324 71CP, 235 92PC, 356102, G01N 3316, G01N 2700

Patent

active

040211177

ABSTRACT:
A method of counting and analyzing pulses representative of characteristics of particles passing through a detector device including detecting the amplitude of each pulse, measuring the area under each pulse and above a reference level, deriving a ratio of amplitude to measured area, and determining which pulses have a ratio over a selected threshold as an indication of simultaneous passage of more than one pulse through the sensing zone of the detector device.

REFERENCES:
patent: 3861800 (1975-01-01), Rapoza et al.
patent: 3936741 (1976-02-01), Coulter et al.
patent: 3938038 (1976-02-01), Campbell

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